Whether you launch the HTML5 using the button in the RUI "Launch HTML5", the access level in the HTML5 UI is limited, and maybe some features are missing.
If you navigate to the URL that you had previously bookmarked, you get the full access to the work centers, tabs and options.
"Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental."
You have used the option “Launch HTML5” to access the HTML5 and it is an expected behavior from the system.
The Responsive UI is in enhancement process, and not all features that are available in HTML5 UI are available in RUI too.
When you use “Launch HTML5” you will open the RUI floorplan in HTML5, so you will see just the same features that you can find in RUI.
It works this way on purpose of make easy edit layout options for RUI.
The easier way to have the URL of full version of HTML5 is deleting the word “new” in “newclient” of the default address of RUI URL.
For your system the main RUI URL is, for example:
Just remove the “new”, and you will have this:
KBA , SRD-CC , Cross Components , How To